Studies on Ecology of Citrus Arrowhead Scale Unaspis yanonensis
柑桔矢尖蚧生态学研究

Citrus arrowhead scale, Unaspis yanonensis (Kuwana) is one of the most widespread and serious destructive scales in orchards of China and Japan. Up to the present, the disaster status in main citrus production province of our country, and biological characteristics as well as control techniques have been reported for this scale. However, its ecological characteristics including the relation between development period and temperature, development temperature threshold and effective cumulative temperature...